Farage is expected to tell the crowd in Jackson, Mississippi, of how he triumphed over electoral odds during the Brexit campaign.
Photograph: Ian Hinchliffe/Rex/Shutterstock

Nigel Farage, the anti-EU British politician and former Ukip leader, will appear with Donald Trump at a rally on Wednesday, a week after the US presidential candidate branded himself “Mr Brexit” and tapped one of the leading American supporters of Brexit to run his campaign.

The Trump campaign confirmed that Farage would appear with Trump at an evening rally in Jackson, Mississippi, to tell US voters “the Brexit story” of how he triumphed over the electoral odds. Farage will not endorse Trump.

Instead, the British politician, who was invited by Mississippi governor Phil Bryant, will draw parallels between what he sees as the inspirational story of Brexit and Trump’s campaign. Farage will describe the Republican’s campaign as a similar crusade by grassroots activists against “big banks and global political insiders” and how those who feel disaffected and disenfranchised can become involved in populist, rightwing politics. With Trump lagging in the polls, just as Brexit did prior to the vote on the referendum, Farage will also hearten supporters by insisting that they can prove pundits and oddsmakers wrong as well.

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This message resonates with the Trump campaign’s efforts to reach out to blue collar voters who have become disillusioned with American politics, while also adding a unique flair to Trump’s never staid campaign rallies.

The event will mark the first meeting between Farage and Trump.

Arron Banks, the businessman who backed Leave.EU, the Brexit campaign group associated with the UK Independence party (Ukip), tweeted that he would be meeting Trump over dinner and was looking forward to Farage’s speech.

The appointment last week of Stephen Bannon, former chairman of the Breitbart website, as “CEO” of Trump’s campaign has seen the example of the Brexit vote, which Breitbart enthusiastically advocated, rise to the fore in Trump’s campaign narrative.

Speaking to a local radio station before the joint rally, Farage urged Americans to “go out and fight” against Hillary Clinton.

“I am going to say to people in this country that the circumstances, the similarities, the parallels between the people who voted Brexit and the people who could beat Clinton in a few weeks time here in America are uncanny,” Farage told Super Talk Mississippi. “If they want things to change they have get up out of their chairs and go out and fight for it. It can happen. We’ve just proved it.”

“I am being careful,” he added when asked if he supported Trump. “It’s not for me as a foreign politician to say who you should vote for ... All I will say is that if you vote for Hillary Clinton, then nothing will change. She represents the very politics that we’ve just broken through the Brexit vote in the United Kingdom.”

Asked if he thought this was the biggest factor in the Brexit referendum, Farage said: “It was the key. It was the absolute key. The reason we won the referendum ... is that we believe immigration should be controlled.”

Both Farage and Trump are keen to limit immigration and protect voters against some of the impact of globalisation.

In a further parallel with Brexit politics, the Trump campaign has argued in recent days that it enjoys support not reflected in the polls, from undercover voters who are shy about admitting their support for the controversial nominee.

In the immediate aftermath of the referendum, Trump flew to Scotland, where he owns a golf resort, and enthusiastically welcomed the decision of the voters to leave the EU, saying it was a “great thing” that voters had “taken back their country”.

Farage has expressed “massive thanks” to Bannon and Breitbart for their favorable coverage of the Leave campaign.

“And can I just say a massive thanks to Breitbart, on both sides of the pond?” Farage told Bannon after the vote. “Because you guys have been fair with me, and given me a chance to make my arguments. I thank you guys very much indeed for that.”

Farage is taking a more prominent role in the Trump campaign even as he stepped away from British politics. Farage stepped down as Ukip leader in the wake of the vote, but has hinted that he could re-enter frontline politics if the British prime minister, Theresa May, does not rapidly press ahead with her promise to ensure “Brexit means Brexit”.

Farage has appeared at Republican events in the past, beginning with a well-received speaking gig at the 2015 Conservative Political Action Conference (CPAC). Farage also popped up at the Republican national convention in Cleveland last month, where he declared himself himself “a huge fan of Barack Obama”.

“Without him we wouldn’t have won the referendum,” Farage explained. “He was very helpful.” The US president had encouraged Britain to remain part of the EU.

Dan Schneider, the executive director of the American Conservative Union, raved at the time about Farage’s CPAC appearance to the Guardian, calling him a “very smart, very funny man and he can turn a phrase very well”.

Farage is not uniform in his support of Trump, however. Last month he told an interviewer that Trump’s anti-Muslim rhetoric makes him “very uncomfortable”.